Mammals do not have these receptors; instead, mammalian eyes collect light and send the information back to the SCN through the optic nerve, a pathway called the retinohypothalamic tract (RHT). This ...
Melanopsin is sensitive to blue light and plays a pivotal role in the circadian system by forming the retinohypothalamic tract. This tract directly projects to the suprachiasmatic nucleus in the ...
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